Dual connection tubular fitting

ABSTRACT

A tubular fitting includes one end arranged for permanent connection with an insertable hose and another end arranged for detachable connection with a detachable hose. The detachable hose includes an internally threaded swivel collar that can be quickly and easily screwed onto an unthreaded from the tubular fitting.

I United States Patent 1111 3,563,569

[72] Inventor Roy Calvin Wilson. [56] References Cited grant Line Road,Santa Paula, Calif. UNITED STATES PATENTS 2,933,428 4/1960 M'euller285/423X P 12 1 3,108,826 10/1963 Black 285/174 2% g f d Feb-16119713,219,367 11/1965 Franck ..285/S.F.(Digest) 1 a e FOREIGN PATENTS562,012 8/1958 Canada 285/423 [54] ?g g: :i :g gg FITTING Primary ExaninerThomas F. Callaghan 5/5 At!0rneyEll1ott& Pastoriza [52] U.S.Cl 28285/174, 285/423 [51] Int. Cl. Fl6l 19/02, ABSTRACT: A l r fittingincludes one end arranged for F16]47/()0 permanent connection with aninsertable hose and another [50] Field ofSeai-ch ..285/i74, (S.F. en arrng d for detachable connection with a detachable Digest), (M Digest),423, 238, 284 (Cnrsory), 260, 386, 387, 388, 354 (Cursory), 5, 66, 423

how. The detachable hose includes an internally threaded swivel collarthat can be quickly and easily screwed onto an unthreaded from thetubular fitting.

PATENTEDFEBISIBYI '3l563i569 INVENTOR.

ROY CALVIN W|LSON JR.

EZIMTZPMW ATTORNE Y5 DUAL CONNECTION TUBULAR FITTING The presentinvention relates to a tubular fitting and more specifically to atubular fitting capable of being permanently connected at one end to ahose and detachably connected at its other end to a detachable hosefitting.

BACKGROUND OF THE INVENTION detachable coupling is frequently leakageprone.

BRIEF SUMMARY OF-TI-IE INVENTION Briefly stated, the present inventioncontemplates a dual connection tubular fitting arranged'and shaped forpermanent connection at one end to a hose and detachable connection atits other end to a detachable hose. The tubular fitting is characterizedby a plastic tubular body having a smooth bore formed on the interiorsurface of one end shaped for being permanently adhesivelyconnected'with the external periphery of an insertable hose. A stop ringis formed on the body interior periphery adjacent an inner portion ofthe smooth bore for limiting inward movement of the hose. The other endof the tubular fitting includes threads for-being interengaged withmating threads of a detachable hose.

The detachable hose is preferably characterized by a tubular-shapedswivel collar component and a tubular-shaped insert component. Internalthreads of the swivel collar are dimensioned to interengage with theabove mentioned externalthreads of the tubular body. A radially inwardlyextending lip is formed on the swivel collar.

The insert includes a snapring and a tandem ring that definetherebetween an annular recess. The snapring has a tapered wall tofacilitate its being inserted with a wedging action into andunder theswivel collar lip. When the snapring and lip are snap fitted together,relative axial movement between the swivel collar and insert isprevented.

BRIEF DESCRIPTION OF THE DRAWINGS The numerous benefits and uniqueaspects of the present invention will be fullyv understood when thefollowing detailed description is studied in conjunction with thedrawings in which:

FIG. 1 is a perspective sectional view, showing the important featuresof the dual connection tubular fitting;

FIG. 2 is an exploded, partially, sectional view, showing the swivelcollar and insert components of the snap-on hose coupling; and,

FIG. 3 is a perspective view showing the dual connection tubular fittingand snap-on hose coupling partially assembled together and the dualconnection tubular fitting permanently adhered to a hose.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT Referring now to FIG.1, a tubular fitting is disclosed that is constructed from a suitabledurable plastic for conducting fluids. One end 11 of fitting 10 is sizedand shaped for being permanently secured to a stationary hose (notshown). Opposite end 12 is shaped and sized for being temporarily anddetachably connected to a detachable hose (not shown).

Formed on interior periphery 13 of fitting 10 is a stop ring 14 locatedcloser to the edge of end 12 than the edge of end 11. Stop ring 14divides interior periphery 13 into two annular zones 15 and 16. Zone 16is a smooth bore that is shaped and sized for being adhesively securedto the external periphery of an insertable hose. Any conventionaladhesive or cement for bonding or fusing plastic material together maybe employed. Stop ring 14 is positioned to limit the travel of the hoseas it is being inserted.

The extreme edge of end 11 is formed with a curved shoulder 17 forfacilitating the insertion of the rigid hose. The inner diameter ofannular zone 15 is substantially equivalent with that of annular zone 16in order to save material and make the overall tubular fitting 10 morelightweight.

A plurality of threads 18 are formed on the exterior periphery of end 12for being interengaged with'the threads of a detachable hose. The outerdiameter of threads '18 exceeds the outer diameter of the other portionsof tubular fitting 10.

Referring now to FIG. 2, a plastic snapon hose coupling 20 isillustrated constructed for detachable connection with the dualconnection tubular fitting described in conjunction with FIG. 1. Hosecoupling 20 includes a'swivel collar 21 of general tubular shape and atubular shaped insert 22. Swivel collar 21 includes an end 23 formedinternally with threads 24 characterized by a crest or inner diameterD,. The other end 25 of swivel collar 21 is formed with a radiallyinwardly extending lip 26 characterized by a diameter D smaller thanthread diameter D,. Lip 26 has a longitudinal thickness t,. A smoothunthreaded zone 27 is disposed between threads 24 and lip 26.

The external periphery of swivel collar 21 includes a series of spacedribs 28 intended to be gripped by a person for use in rotating orswiveling collar 21. j

Tubular shaped insert 22 is characterized by an external diameter D;,slightly smaller than or equivalent to lip diameter D,. One end 29nearest swivel collar 21 forms a snapring 30 having a tapered orconverging wall 31. Snapring diameter D exceeds lip diameter D, and isslightly less than the inner diameter of smooth unthreaded zone 27.

A tandem ring 32 is arranged on insert 22 behind snapring 30. Snapring30 and tandem ring 32 form therebetween an annular recess 33 having alongitudinal length or thickness r slightly greater than lip thicknessIn order to couple swivel collar 21 and insert 22 together, the twocomponents are aligned as shown and then snapring 30 is thrust, by ahammer tap for. example, into and under lip 26 until lip snaps intorecess 33. Relative axial movement between swivel collar 21 and insert22 is prevented when snapring 30 and lip 26 are thus snap-fittedtogether. Tapered wall 31 permits snapring 30 to be wedged inwardlythrough the opening defined by lip 26. When swivel collar 21 and insert22 are thus securely coupled together, a person may easily swivel collar21 by gripping ribs 28 and exerting a twisting movement.

FIG. 3 shows dual connection tubular fitting 10 partially threaded intosnap-on hose coupling 20. The other end 11 of tubular fitting I0 isshown permanently secured by a suitable adhesive to a stationary hose34. Hose 34 represents,,for example, an inlet hose for an orchardirrigation system or the outlet or faucet of a reservoir forreplenishing recreational vehicle water supplies.

OPERATION Keeping the above construction in mind, it can be understoodhow the previously described disadvantages of prior art hose couplingsare overcome or substantially eliminated by the present invention.

In order to benefit from the advantages of the present invention, aperson initially spreads adhesive over the end of hose 34 and then slipsplastic tubular fitting 10 over rigid hose 34 and waits until they arepermanently connected together.

In order to detachably connect plastic snap-on hose coupling 20 totubular fitting 10, swivel collar 20. is easily screwed onto threads 18of tubular fitting 10. After fluid has been supplied to its destination,tubular fitting 10 and hose coupling 20 can be quickly and easilydisconnected by twisting swivel collar 21 in a reverse direction.

From the foregoing it will be evident that the present invention hasprovided a dual connection tubular fitting in which all of the variousadvantages are fully realized.

lclaim:

1. A detachable conduit coupling comprising:

a. a tubular fitting including a plastic tubular body having a first endand a second end;

b. a smooth bore formed on the interior surface of the first endpermanently adhesively connected with an insertable hose;

c. a stop ring formed on the body interior periphery adjacent an innerportion of the smooth bore, the stop ring being arranged to limit inwardmovement of the hose;

d. a curved shoulder formed on an entrance portion of the first end tofacilitate insertion of the hose;

e. threads formed on the external surface of the second end having anouter diameter exceeding that of the tubular y;

f. a plastic snap-on hose coupling including a tubularshaped swivelcollar and a tubular-shaped insert;

g. internal threads extending inwardly from one end of the swivel collarinterengaged with said external threads of said tubular body second end;

h. a radially inwardly extending lip formed on the other swivel collarend;

i. a snapring formed on one end of the insert having an outer diameterlarger than the inner diameter of the swivel collar lip so that thesnapring can be snap fitted into the lip. the snapring being formed witha tapered wall to facilitate its insertion with a wedging action intothe lip;

j. a tandem ring axially spaced on the insert from the snapring todefine therewith an annular recess shaped to captivate the lip, therecess being shaped to stop relative axial movement between the swivelcollar and insert as the swivel collar is being coupled to or uncoupledfrom the tubular body; and

k. plural ribs on the external surface of the swivel collar that may begripped by a person to rotate the collar relative to the insert.

1. A detachable conduit coupling comprising: a. a tubular fittingincluding a plastic tubular body having a first end and a second end; b.a smooth bore formed on the interior surface of the first endpermanently adhesively connected with an insertable hose; c. a stop ringformed on the body interior periphery adjacent an inner portion of thesmooth bore, the stop ring being arranged to limit inward movement ofthe hose; d. a curved shoulder formed on an entrance portion of thefirst end to facilitate insertion of the hose; e. threads formed on theexternal surface of the second end having an outer diameter exceedingthat of the tubular body; f. a plastic snap-on hose coupling including atubular-shaped swivel collar and a tubular-shaped insert; g. internalthreads extending inwardly from one end of the swivel collarinterengaged with said external threads of said tubular body second end;h. a radially inwardly extending lip formed on the other swivel collarend; i. a snapring formed on one end of the insert having an outerdiameter larger than the inner diameter of the swivel collar lip so thatthe snapring can be snap fitted into the lip, the snapring being formedwith a tapered wall to facilitate its insertion with a wedging actioninto the lip; j. a tandem ring axially spaced on the insert from thesnapring to define therewith an annular recess shaped to captivate thelip, the recess being shaped to stop relative axial movement between theswivel collar and insert as the swivel collar is being coupled to oruncoupled from the tubular body; and k. plural ribs on the externalsurface of the swivel collar that may be gripped by a person to rotatethe collar relative to the insert.